Hi @Omegaalpha12433
The actual preview will show in the next step of the command, after you’re done selecting all your edges - so press enter.
HTH, Jakob
I agree though, fillets would benefit from a better preview.
I also think that Rhino should enable fillet editing on older files.
(the option/data is lost when saved and reopened isn’t it?)
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It is not - but ut only goes one level deep…
-Pascal